CARDIAC RATE TRACKING IN AN IMPLANTABLE MEDICAL DEVICE

摘要

Self-correlation enhancements and implementations are described. In particular, certain examples demonstrate the use of a tracking mechanism to identify and/or confirm cardiac rate using data from iterative self-correlation performed at intervals over time. This may enable the interpolation of cardiac rate in an implantable medical device when data is insufficient, and may provide confidence in cardiac rate analyses.

主权项

1. A method of operation in an implantable cardiac device comprising:
analyzing cardiac data using a rate estimation method iteratively over time to yield a series of cardiac rate estimates; determining that the series of cardiac rate estimates establishing a first cardiac rate track; and following establishment of the first cardiac rate track, attempting a particular iteration of the rate estimation method and:
determining that the cardiac data of the particular iteration fails to provide a cardiac rate; andinterpolating a cardiac rate estimate using the first track.